Heating apparatus



April 15, 1930. H. R. HUMPHREY ET AL 1,754,952

HEATING APPARATUS.

Filed Nov 3, 1928 5 Sheets-Sheet l IN VEN TOR Nabe# Nam/Jhr@ A TTORNE YS April 15, 1930. H. R. HUMPHREY ET A1.

HEATING APPARATUS Filed Nov. 5, 1928 3 Sheets-Sheet 2 IN VV TOR Nabe/Y Humphrey A TT ORNE YS* April` 15, 1930. H. R. HUMPHREY ET AL 1,754,952

HEATING APPARATUS Filed Nov, 5, 1928 3 Sheets-Sheet 3 Patented Apr. 15, 1930 UNITED STATES PATENT OFFICE HUBERT R. HUMPHREY AND GEORGE A. HUMPHREY, v(')IE KALAMAZOO, MICHIGAN, ASSIGNOIR-S TO GENERAL GAS LIGHT COMPANY, OF KALAMAZOO, MICHIGAN HEATING APPARATUS Application mea November a, 192s. serial No. 314,017.

The main objects of this invention are:

First, to provide a heating apparatus which is highly efficient, of large capacity and at the same time compact in structure.

Second, to provide a heating apparatus which is well adapted for heating garages, factories and the like and may be suspended in the upper part of a room, and at the same time effectively distributes the heat and circulates the air within theroom.

Third, to provide in a heating apparatus an automatic control for the main or heating burner which provides a maximum of safety, the main burner being automatically lighted romla pilot and the main burner valve control mechanism being rendered inoperative on extinguishing the pilot..

Fourth, to provide a heating apparat-us in which the heated gases and products of combustion are circulated through the radiating unit under pressure.

Fifth, to provide in a heating apparatus an improved burner structure.

Objects pertaining to details and economies of construction and operation of our invenl tion will definitely appear from the description to follow. The invention is defined in the claims.

A structure which embodies .the features of our invention is illustrated in the accompanying drawings in which:

Fig. 1 is a front elevation of our improved heating apparatus, the discharge flue and hangers being partially broken away.

Fig. 2is a side/elevation.

Fig. 3 is alfragmentary rear elevation.

Fig. 4 is a detail view partially in vertical section on line 4-4 of Figs. 1 and 3.

Fig. 5 is a detail view partially in vertical section on line 5-5 of Figs. 2, 4 and 6.

Fig. 6 is a detail view mainly in horizontal section on line 6-6 of Figs. 4 and 5.

Fig. 7 is a detail section on line 7-7 of Fig. 4. Fig.' 8- is a det-ail view partially in horlzontal section on line 8 8 of Fig. 4 showing details ot the burner.

v Fig. 9 is a diagrammatic view showing the 'relation of the' pilot burner and cut-out switch i to the motor.

In the embodiment of our invention illustrated we provide a base member l provided with a plurality of discharge openings 2 surrounded by lue seats 3. The top member 4 is provided with openings 5 through which the upper ends of the lues 6 project, these lues being arranged with their lower ends in the seats 3. Theues are preferably arranged in aligned rows as illustrated and we have the tubes.

The header member 9 is arranged on the top member to provide a discharge header 10 for the ues, the discharge lue 11 being connected `centrally to this header. In practice this iiue 11 is also of relatively small diameter and constitutes a restricted discharge for the radiator unit. The tie bolts 12 connect the header member 9 to the base member, thereby clamping these elements or parts in assembled relation.

The hanger rods 13 are inserted through lugs 14 on the base member and are arranged through arms 15 projecting at the ends of the top member. These hanger rods are swiveled in the lugs 14, rotatable in the arms 15 and threaded at their upper ends so that they may be engaged with couplings 113 on the lower ends of the supports 114, thus providing a very simple and convenient meansl which extends across the combustion chamber.

The gas supply pipe 21 is connected to a header 22 mounted on the front side of 4 the burner housing and provided with a plurality of nozzles 23 delivering through the front wall of the housing. The regulating valves 24 of the nozzles are adjustable from the front of the housing and are provided with removable caps 25. The nozzles 23 are removable so that the apparatus may be supplied with nozzles having orifices of suitable size so that the apparatus can be readily adapted for natural gas or for artificial gas.

We provide a plurality of burner units each consisting of a chambered head member 26 carrying a mixing tube 27 which extends across the combustion chamber into operative relation to the nozzle 23. The primary air inlet 28 of the mixing tube is within the cpmbustion chamber and adjacent the nozz e.

Each header is provided with a plurality of tubular burners 29 which are disposed in a plane above the mixing tubes.

The burner units are secured to the rear wall of the burner housing member by means of the screws 30, the rear wall having openings therein to receive the burners and the mixing tubes so that these units may be independently removed.

The conical valves 31 coact with the ends of the mixing tube and are adjustable from the outside of the head members. These valves are carried by blocks 32 which also carry tubular screens 33 surrounding the ends of the mixing tubes as shown in Fig. 8. The screens may be thus readily removed for cleaning.

The bale plate 34 depends from the rear wall 20 of the base member in spaced relation to the rear wall of the burner housing to provide a down-passage delivering to the lottom of the combustion chamber-see e preferably provide an air directing plate 35 which 1s arranged horizontally between the burners and mixing tubes, as shown` in Figs. 4 and 5, this plate being provided with rows of secondary air inlet openings 135 arranged below the burners 29 so that the secondary air is effectively directed to the burners. Further, the secondary air serves as a cooling means for the burners. The air passing through the opening 18 flows across the burners and also serves as a cooling means. These burners in practice are preferably formed of an alloy containing chromium such as stainless steel or michrome, which material is capable of withstanding the heat without material change. An air directing baille 136 for the primary air depends from the air directing plate 35 to receive the inner ends of the mixing tubes, the secondary air for the mixing tubes passing beneath this directing baie. This prevents the forming of disturbing air currents around the primary air inlets as the air under pressure or blast of air is delivered to the combustion chamber.

A pilot 36 preferably a gas pilot is provided at each end of the combustion chamber. These pilot burners are shown conventionally. The pilots are connected to the gas supply pipe 21 in advance of the main burner control valve 37 by means of the conduits 38.

At the rear of the radiating unit We mount a blower consisting, in the embodiment illustrated, of the electric motor 39 having a shaft 40 projecting at each end thereof on the forward ends of which the fan blades 41 are mounted. An air directing hood 42 is provided to direct the air to the radiating tubes 'and also to the air inlet 18-see Fig. 4-*so that air is delivered by the blower across the radiating lues and to the combustion chamber.

On the rear end of the motor shaft we mounta governor device consisting of the governor balls 43 carried by the arms 44 pivoted at 45 on the sliding collar 46. These arms are connected by the links 47 to a lixed collar 48 on the motor shaft. A spring 49 disposed between these collars acts to hold the governor balls inwardly in the position shown in Fig. 4. When the motor is running, however, the governor seats are thrown out by centrifugal action, acting upon the valve lever 50 pivoted at 51 to coact with the stem 52 of the valve designated generally by the numeral 37, thereby opening the valve and supplying gas to the main burner when the motor is in operation. The gas supply pipe is cut oil' when the motor stops so that the apparatus may be controlled from a control switch 53.-see Fig. 9.

To prevent the opening of the gas valve in the event the pilot becomes extinguished, we provide a cut-out switch designated generally bythe numeral 54 (Fig. 9) which is associated with a thermal element 55 disposed in such relation to one of the pilots, as shown in Fig. 5, that the thermal element is heated thereby land maintains the switch in closed position. Should the pilot become extinguished, however, the thermal element cools, opening the cut-out switch so that the motor cannot be started until the pilot is relighted and the switch again closed through the thermal element. Should the pilot become clogged or extinguished while the main burner is in operation, the heat of the main burner will maintain the cut-out switch closed so that the cutout switch opens only when the current is ofi'. However, once having opened, it is not possible to start the apparatus'until the pilot has been relighted.

The motor is carried by a bracket 56 extending rearwardly rom the hood 42, a supporting arm 57 being also provided for supporting the bracket.

At the front of the radiating tubes we mount a seriesf adjustable louvers58 carried by the side plates 59 and being capable of adjustment so that the heated air may be directed downwardly to the degree desired. At the rear of the radiating'tubes we provide a series of deflectors 60 of rearwardly tapered cross section, these being aligned with the rows of tubes and serving to distribute the current of air delivered from the i blower quite uniformly throughout the radiator units. These units being tapered sub stantially reduces the resistance orbatliing effect which results from delivering the air directly against the tubes.

By delivering the air from the blower to the combustion chamber highlyetficient coinbustion of the gas is maintained. This enables the making of a very compact unit of large capacity; a large amount of gas may be efficiently burned in a relatively small ycombustion chamber and the radiating capacity of the radiator unit is much more efficient than would otherwise be possible. The heated gases and products of combustion are forced through the lues which renders it practical to employ flues of relatively small dimensions or to restrict the discharge there from. rlhe restricted outlets of the flues result in maintaining the heated gases therein until a very large percentage of the heat is transferred, and also renders it possible to use a relatively small discharge fine l1 without impeding the proper circulation. A low stack or discharge flue temperature may be had without danger from condensation.

.till

heat units.

The burners being mounted in the burner housing as described, this housing and the burners constitute an assembled unit which may be removed by releasing the bolts 17 and loosening the coupling 137 for the gas pipe 121 when the burner unit or the housing 16 mountn ed therein may be swung to one side thereby exposing all of the burners for inspection and also exposing the radiating flues so that they may be cleaned from below as by means of a brush or other suitable flue cleaner. The lilies being arranged in rows allows for the free delivery of air through the radiator unit as by means of a fan.

Uur improved heating apparatus is very efficient both in the mattei' of heating capacity andin the utilizationof a large percentage of rlhe apparatus has the advantages of safety and is very compact in proportion to capacity.

We have illustrated and described our improvements in an embodiment which we have found very satisfactory. We have not attempted to illustrate and describe other embodiments and adaptations as we believe this disclosure will enable those skilled in the art` to embody or adapt our improvements as may be desired.

Having thus described our invention, what we `claim as new and desire to secure by Letters Patent, is:

l. In a heating apparatus, the combination of a cbambered base member having a plurality of combustion chamber discharge open ings surrounded by upwardly facing flue seats, a top member having a plurality of flue openings therein, radiating iues of relatively small diameter arranged with their upper ends through said openings in said top member and their lower ends in said seats in said base member, flue clamping strips mounted on said top member to engage the upperends of said' lines and having restricted flue discharge openings therein, a flue header member mounted on said top member to coact therewith to provide a iiue header, said header being provided with a discharge flue, a burner housing member mounted on said base member' to coact therewith to provide a combustion chamber, and gas burners mounted on said burner housing member and having primary air inlets opening therein.

2. In a heating apparatus, the combination of a base member having upwardly facing flue seats, a top member having a plurality openings in said top member and their lower ends in said seats in said base member, flue clamping strips mounted on said top member to engage the upper ends of said tlues, and a flue header member mounted on said top member to coact therewith to provide a flue header. j

3. In a heating apparatus, the combination of a combustion chamber, radiating iues opening thereto and arranged in aligned rows, a burner, a blower mounted to deliver air across said flues, and deflectors of tapered cross section arranged between said blower and the rows of flues with their apexes toward the blower.

4. ln a heating apparatus, the combination of a radiating unitv comprising a plurality of'flues arranged in rows from front to rear, means for delivering air across said fines in the direction of the aligned rows, and deiiectors of tapered section arranged in alignment with the rows of lues with their apeXes towardsthe air delivery means.

5. ln a heating apparatus. the combination of a radiating unit comprising a plurality of ues arranged in rows from front to rear, means for delivering air across said flues in the direction of the aligned rows, and de flectors arranged in alignment with the rows of flues.

6. ln a heating apparatus, the combination of a combustion chamber, radiating fluef, opening thereto and arrangedin rows, a burner arranged in said combustion chamber, a

header to which said flues deliver, a blower mounted to deliver air across said fiues,`and deilectors of tapered section arranged between said blower and the rows of flues with their narrow edges toward the blower.

7. In a heating apparatus, the combination of a combustion chamber, radiating flues opening thereto and arranged in rows from front to rear, a header to which said lues deliver, said radiating fines having restricted discharge openings to said header, a relatively small discharge lue for said header, a burner, and means for supplying primary and secondary air to said burner underpressure and discharging air across said radiator iues in the direction of their aligned rows.

8. In a heating apparatus, the combination of a combustion chamber, a flue header, a plurality of lues of relatively small diameter extending between said combustion chamber and header and having restricted discharge openings to said header, a burner arranged within said combustion chamber, and means for delivering a blast of air across said radiating flues and to the primary air inlets of said burner and to said combustion chamber.

9. In a heating apparatus, the combination with a combustion chamber, of radiating lues opening thereto, a header to which said fines deliver, said header being provided with a discharge flue of substantially less capacity than that of the vradiating fines, a burner arranged in said combustion chamber, and means for discharging air across said radiating fines and delivering air under pressure to said combustion chamber.

10. In a heating apparatus, the combination of a closed combustion chamber, a Hue header, radiating lines connected to said combustion chamber and having restricted discharge openings to said header, burners arranged within said combustion chamber and having primary air inlets opening therein, a blower, and an air directing hood for said blower arranged to direct air across said flues and to said combustion chamber.

11. In a heating apparatus,` thecombination of a closed combustion chamber provided with an air inlet, a burner arranged within said combustion chamber and having a primary air inlet opening therein, a plurality of radiating iues connected to said combustion chamber and having restricted discharge openings, and means for delivering air across said lues and to said combustion chamber.

12. In a heating apparatus, the combination of a combustion chamber, a Hue header, radiating fines opening to said combustion chamber and fiue header, a plurality of burners arranged horizontally within said combustion chamber, mixing tubes operatively associated with said burners and having primary air inlets within said combustion chamber, and means for discharging air across said radiating'ilues and delivering air to said combustion chamber. l

13. The combination with a closed burner chamber, of a plurality of radiating lues opening to said burner chamber and provided with a restricted discharge, a burner arranged with its primary air inlet opening to said chamber, and means for delivering air under pressure to said burner chamber.

14. In a heating apparatus, the combination of a combustion chamber, a flue header, radiating lues opening to said combustion chamber and iue header, a burner within said combustion chamber, and means for discharging a blast of air across said radiating flues and delivering air to said combustion chamber.

15. In a heating apparatus, the combination of a combustion chamber, radiatinfr lues connected to said combustion cham er, a burner within said combustion chamber having a primary air inlet opening therein, and means for discharging air across said radiating flues and delivering air to said combustion chamber.

16. The combination with a combustion chamber, of a plurality of radiating lues connected to said combustion chamber, a

bustion and heated gases through said flues and adapted also for discharging air across said iues.

17. The combination with a combustion chamber, of a radiator unit operatively associated with said combustion chamber, said radiator being provided with a restricted discharge passage, a burner disposed with its primary and secondary air inlets within said combustion chamber, and means for delivering air to said combustion chamber for supplying air to said burner and maintaining a forced circulation of the heated gases and products of combustion through said radiator unit, and'for delivering air across said radiator unit.

18. vThe combination with a burner, of a radiator unit operatively associated with said burner so that the products of combustion and heated gases from the burner are delivered through said radiator unit, said radiator unit having a restricted discharge, and means for delivering primary and secondary air under ressure to said burner and for inducing a orced circulation of the products of combustion and heated gases through said radiator unit. .l

19. The combination with a combustion chamber, of a burner disposed with its primary and secondary air inlets within said combustion chamber, a. radiator unit connected to said combustion chamber so that the products of combustion and heated gases circulate through said radiator, and means for delivering air under pressure to said burner combustion chamber and across said radiator unit.

20. In a heating apparatus, the combination of a combustion chamber, a radiator unit operatively associated with said combustion chamber to receive the products of combustion therefrom, a burner arranged in said combustion chamber and having its primary air inlet opening thereto, and means for supplying air under pressure to said combustion chamber.

21. The combination with a burner, of a radiator unit operatively associated with said burner, and means for delivering primary and secondary air under pressure to said burner and dischargin air across said radiator unit.

22. The com ination with a burner, of a radiator unit operatively associated with said burner, and means for supplying primary and secondary air under pressure to said burner for creating a forced draft through said radiator unit and for discharging a blast of air across said radiator unit.

23. The combination with an inclosed burner and a radiator unit operatively associated with said burner, of means for delivering a blast of air to said burner and across said radiator unit.

auf' 24. In a heating apparatus, the combination of a closed combustion chamber provided with an air inlet, a radiator element operatively associated with said combustion chamber, a main burner arranged within said combustion chamber and having a primary air inlet openin therein, a pilot arranged within saidA com ustion chamber, a control valve for said main burner, a motor mounted at one side of said radiator element and provided with a driving shaft projecting at both ends, fan blades on the forward end of said shaft, a valve controlling mechanism including a governor device mounted on the rear end of said motor shaft and acting to open the valve while the motor is running, a cutout switch for said motor including a thermal element operatively associated with said p ilot whereby the pilot acts to maintain the switch in closed position while the pilt is operative, and an air directing hood operatively associated with said fan blades to direct the air across said radiator element and to said air inlet of said combustion chamber.

25. In a heating apparatus, the combination of a closed combustion chamber provided with an air inlet, a radiator element operatively associated with said combustion chamber, a main burner arranged within said combustion chamber and having a primary air inlet opening therein, a pilot arranged within said combustion chamber, a control valve for said main burner, a motor mounted at one side'of said radiator element and provided with a'driving shaft projecting at both ends, fan blades on the forward end of said shaft, a valve controllingmechanism including'a governor device mounted on the rear end of said motor shaft and acting to open the valve while the motor is running, and an air directing hood operatively asso ciated with said fan blades to direct the air across said radiatorelement and to said air inlet of said combustion chamber.

26. In a heatingapparatus, the combination of a closed combustion chamber, a radiator unit operatively connected with said combustion chamber to constitute outlets there for, a main burner arranged within said combustion chamber and having a primary air inlet opening therein, a pilot arragned within said combustion chamber, a control valve for said main burner, a blower including a motor for delivering air to said radiator element and to said combustion chamber, a valve control mechanism operatively associated with said motor and acting to open the valve when the motor is running, and a cut-out switch for said motor including a thermal element operatively associated with said pilot whereby the pilot acts to maintain the switch in closed position.

27. In a heating apparatus, the combina-4 tion of a closed combustion chamber, a heat radiating unit connected to said combustion chamber to constitute an outlet therefor, a main burner arranged within said combustion chamber and having a primary air inlet opening therein, a pilotarranged within said combustion chamber, a control valve for said main burner, a blower including 'a motor for delivering air across said radiating unit and to said combustion chamber, and a valve control mechanism operatively associated with said motor and acting to open the valve when the motor is running.

28. In a heating apparatus, the combination of a radiating unit, a main burner operatively associated with said radiating unit, a pilot operatively associated with said main` burner, a control valve for said main burner, means for delivering a blast of air to said radiating unit including a motor, a valve control mechanism including a governor device operatively connected to said motor and acting to open the valve while the motor is p running, and a cut-out switch for said motor including a thermal element operatively associated with said pilot whereby the pilot acts to maintain the switch in closed position.

29. In a heating apparatus, the combination of a radiating unit, a main burner operatively associated with said radiating unit, a pilot operatively associated with said main burner, a control valve for said main burner, means for delivering a blast of air to said radiating unit including a motor, and a valve control mechanism including a governor device operatively connected to said motor andV acting to open the valve while the motor is running.

30. In a heating apparatus, the combination of a main burner, a ilot, operatively associated with said main urner, a control valve for said main burner, a valve mechanisrn including a motor and acting to open the valve while the motor is running, and a cut-out switch for said motor including a thermal element operatively associated with said pilot whereby the pilot acts to maintain the switch in closed position.

In witness whereof we have hereunto set our hands.

HUBERT R. HUMPHREY. GEORGE A. HUMPHREY. 

